Adds security to a sliding glass door: Keeps the slider from being forced open from outside, even with a pet door panel in place Steel construction: Heavy steel body and pin, sized to handle force against a slider Two colors: White or black to match common slider frames Works with most slider pet doors: Compatible with Liberty patio panels and other major pet door brands installed on sliding doors Tool-free install: Mounts to the slider track, no drilling or permanent modifications Slidelock is a steel security lock for sliding glass doors. It is built for the specific case where a pet door panel is installed in the slider track and the owner wants a secondary lock that the original sliding door latch cannot provide.The body is steel, with a pin that locks the slider in place once the pet door panel is seated. Available in white and black. The lock installs in the track itself, so no drilling and no permanent modifications. It pulls back out cleanly when not needed.Slidelock is brand-agnostic. It works with sliding glass door pet panels from multiple manufacturers, including the Liberty aluminum patio panel, vinyl patio panel, and cat patio panel, along with most aluminum and vinyl sliding doors with a pet panel installed. Confirm your slider track has a roughly standard depth before ordering.Easy DIY install, no tools required.